High-Efficiency Desalination & Brine Valorization Equipment
Explore our pre-assembled, factory-tested skids and containerized units optimized for high recovery rates, minimal power consumption, and demanding brine concentration standards.
Engineering Paradigms in Desalination Brine Utilization
A comprehensive analysis of membrane concentration, selective crystallization, and zero liquid discharge systems transforming hypersaline discharge streams into commercial-grade resources.
Osmotically Assisted RO (OARO)
Overcoming thermodynamic osmotic pressure barriers. Our multistage OARO architectures concentrate brine streams past conventional SWRO limits (65,000–75,000 mg/L TDS) up to 130,000–160,000 mg/L TDS before mechanical thermal treatment, slashing thermal evaporation steam duties by up to 60%.
Disc Tube Reverse Osmosis (DTRO)
Utilizing high-shear open-channel membrane discs to process hypersaline streams laden with organic foulants and scaling ions. Capable of operating up to 90–120 bar without the irreversible channel blocking typical of standard spiral-wound designs, delivering consistent brine concentration factors.
Strategic Mineral Valorization
Transforming environmental liabilities into commercial mineral revenue streams. Systems integrate selective nanofiltration (NF) and chemical precipitation for high-purity extraction of technical-grade NaCl (sodium chloride), magnesium hydroxide (Mg(OH)₂), and pharmaceutical-grade gypsum.
| Brine Utilization Process Phase | Standard Marine Discharge Disposal | Conventional Thermal ZLD | Tongjie Integrated Hybrid Valorization |
|---|---|---|---|
| Specific Energy Consumption | 0.1 – 0.3 kWh/m³ (Pumping only) | 25 – 45 kWh/m³ (Direct MVR) | 8.5 – 14 kWh/m³ (Membrane-Boosted) |
| Freshwater Recovery Yield | 0% (Effluent wasted) | 90% – 95% | Up to 98.5% Net Water Recovery |
| Resource Byproduct Recovery | None (Marine ecotoxicity risk) | Mixed industrial solid cake (Waste) | High-purity industrial NaCl, Mg salts |
| Environmental Compliance | Increasingly prohibited by EPA/MEP | Compliant but high OPEX | Full ESG/ZLD Compliance with Carbon Credits |
Why Tier-1 EPCs Partner with Chinese Manufacturers
The convergence of precision metallurgical casting, end-to-end membrane module manufacturing, and pre-commissioned modular assembly offers distinct competitive advantages.
Vertical Integration & Raw Metallurgy
China commands over 60% of the world's precision high-alloy casting capacity. Tongjie leverages localized procurement of Duplex 2205, Super Duplex 2507, and Grade 2 Titanium piping assemblies, insulating international procurement programs from volatile commodity swings and reducing lead times by up to 40%.
Complete Factory Skid Testing (FAT)
Every brine concentration unit undergo rigorous hydraulic, hydrostatic, and electrical testing inside our Shanghai fabrication base. Fully equipped testing bays validate pressure ratings up to 160 bar, PLC logic loops, automated valve cycles, and membrane integrity before containerization, minimizing on-site work.
Flexible OEM/ODM Engineering Scalability
From private-label branding for international water treatment OEMs to tailored mechanical dimensions for offshore installations, our engineering team adapts skid layouts to exact client specifications, CAD formats, and local voltage/frequency requirements.
Localization Support, Quality Standards & Compliance
Global project developers demand strict alignment with international quality controls, regional welding standards, and seamless field lifecycle management.
Global Standards: ASME & CE Marking
Our pressure vessels, membrane housings, and structural frames comply with ASME Boiler and Pressure Vessel Code (Section VIII), CE Pressure Equipment Directive (PED 2014/68/EU), and ISO 9001, 14001, and 45001 international management protocols.
Global Field Engineering & Commissioning
We provide full-lifecycle on-site commissioning services, operational staff training, and fast-response spare parts logistics. Our engineers have deployed across 30+ countries throughout the Middle East, Central Asia, Southeast Asia, and Latin America.
Cloud-Integrated SCADA & Diagnostics
Built-in industrial IoT gateways provide secure, encrypted telemetry monitoring to track differential pressures, flux rates, scaling indexes, and energy consumption, ensuring prompt predictive maintenance and remote troubleshooting.
High-Salinity Brine Utilization Across Global Industries
Proven installations delivering continuous operation in demanding operational settings.
Coastal Mega-Desalination Plants
SWRO facilities produce high volumes of concentrated reject brine. Our membrane concentration retrofits recover up to 50% additional permeate, converting hypersaline effluent into feed for chlor-alkali and industrial salt production.
Oil & Gas Produced Water Treatment
Treating high-TDS fracturing flowback and produced waters. Combining oil-water separation with DTRO and OARO membrane trains reduces brine volume, yielding clean water suitable for reuse and deep-well reinjection.
Coal Chemical & Petrochemical Complexes
Meeting zero liquid discharge (ZLD) mandates in inland industrial parks. Skid-mounted membrane arrays handle organics, silica, and heavy ions, reducing thermal crystallizer duties and cutting operating costs.
Emerging Trends Shaping the Brine Valorization Industry
Next-generation innovations in membrane materials, selective mineral recovery, and renewable energy integration.
Membrane Distillation (MD)
Low-temperature thermal desalination driven by industrial waste heat. Utilizing hydrophobic microporous membranes, MD achieves high-purity water extraction from near-saturation solutions, operating where conventional RO meets pressure limits.
Electrodialysis Metathesis (EDM)
Combining electrodialysis with ion-exchange resins to convert low-solubility scaling salts into highly soluble species, increasing water recovery beyond 95% and producing concentrated, separated chemical streams.
Solar & Wind Desalination Integration
Modular brine concentration systems engineered for direct coupling with variable renewable energy. Dynamic control algorithms adjust pumping speeds and recovery rates based on real-time solar or wind generation, lowering operating carbon footprints.
Frequently Asked Questions on Brine Utilization & Desalination
Answers to common questions regarding process parameters, membrane longevity, scale prevention, and equipment customization.
What is the typical concentration limit for your high-pressure membrane systems?
Using our ultra-high pressure disc tube reverse osmosis (DTRO) and osmotically assisted reverse osmosis (OARO) arrays, our systems routinely concentrate brine up to 120,000 to 160,000 mg/L TDS at operating pressures between 90 and 120 bar. This significantly reduces hydraulic loads sent to downstream thermal crystallizers or MVR units.
How do you handle severe membrane scaling from calcium, barium, and silica?
We deploy a multi-tiered defense strategy: comprehensive chemical softening (lime-soda or caustic) coupled with high-efficiency multimedia or tubular microfiltration, targeted anti-scalant dosing, and specialized DTRO open-channel geometry that maintains high fluid turbulence across the membrane surface to prevent boundary-layer concentration polarization.
Can your modular desalination systems be configured for off-grid operations?
Yes. Our modular and containerized desalination plants can be integrated with off-grid photovoltaic (PV) arrays, battery energy storage systems (BESS), or diesel-hybrid grids. Variable-frequency drives (VFD) and automated PLC logic regulate system feed rates and recovery targets in response to intermittent energy supply.
What specific metallurgical grades are utilized for high-salinity wetted parts?
To resist pitting and crevice corrosion in chloride-dense environments, we construct high-pressure piping manifolds, pump impellers, and valve trims from Super Duplex Stainless Steel 2507 (UNS S32750), Duplex 2205 (UNS S31803), or Titanium Grade 2, certified with full 3.1 material test reports (MTR).
What is the typical fabrication, assembly, and testing lead time?
Standard containerized SWRO units and DTRO concentration skids generally complete manufacturing, assembly, and factory testing within 8 to 12 weeks. Fully customized zero liquid discharge systems requiring custom metallurgy and specialized crystallization trains average 16 to 20 weeks.
Do you support international private label (OEM) and custom branding?
Yes. We regularly supply OEM skid-mounted assemblies for global engineering contractors, equipment distributors, and system integrators. We support customized enclosure geometries, color matching, client-specified PLC platforms (e.g., Siemens, Allen-Bradley), and customized multilingual documentation.
High-Salinity Wastewater, ZLD & Deoxygenation Systems
Reliable membrane and separation systems engineered for industrial wastewater reduction, pure water polishing, and degassing applications.
